Train-control speed governor



Apg. 6, 1929. c. c. FARMER TRAIN CONTROL SPEED GOVERNOR 5 Sheets-Sheet Filed June 17, 192'? 7 67 NEN-ron OLYDE C. FARMER ATTORNEY ug- 6, 1929 c. c. FARMER 1,723,144-

TRAIN CONTROL SPEED GOVERNOR Filed June 1'7I 1927 3 Sheets-Sheet 2 mamil- /llllllll INVENTOR CLYDE C. FARMER ATTORNEY Aug 6, 1929- l c. c. FARMER 1,723,144

TRAIN CONTROL SPEED GOVERNOR Filed June 17, 1927 5 Sheets-Sheet 3 84 Se a4 36 8KB m6736- "un A G 35 374/ a5 82 39 1 5l' I? 40 ci I 56 INVENTOR *y CLYDE C FARMER v ATTORNEY Patented Aug. 6, 1929.

wirr. *stares Param* OFFICE.

CLYDE C..FARMER, OF PITTSBURGH, PENNSYLVANIA, ASSEGNO?. TO THE "WESTING- HOUSE AIR BRAKE COMPANY, 0F 'WLMEBDI1\ IG, PENNSYLVANA, A CORPORATIQN or PENNSYLVANIA TRAIN-.CONTROL srnno eovnaiaon.k

Application. filed June. 17, 1927. seal No. 199,506.

This invention relates to a speed governor mechanism for automaticv train control equipments and adapted'to be controlledk by the speed 'of the trai-n for limiting the speed at which the train may run.

YTith some train .control installations, only one speed limit is provided, in others two may be required', and in others three speedlirnits, lsuch as high speed`,med ium speed, and low speed.V l

@ne object of my-invention is to provide a speedgovernormechanism having a primary speed governor device adapted for'one speed limit control and so constructed that .one or moreauxiliary governor devices ymay readily `be added to the primary governor device, When the equipment is intended to operate at I two or morespeed limits. i'

' '1ny freight service, the speed limits' desired may be ditierent from the speed limits desired for' passenger service, and `anothe: 'obj ect of my' invention is to provide a speed governor vmechanism having vmemes for' adjusting the mechanism to operate at different speed limits according to the service.

'Other objects and advantages will appear inthe following more detaiieddescription of the invention. In' the accompanying drawings; Fig. 1 is av central sectional view: of a speed control tion; Fig. 2 is a. central sectional view-ofthe mechanism shown in Fig. 1, talren ony a plane at right angles to the plane of Fig. 1; Fig. 3 a section on the line of 5;Fig. da sectionon theflin'e' 444i of Fig. 1; Fig'. 5 a section of the change speed` gear portion `Of the mechanism, showing-the gears 'shifted to a diiierent position from that shown inFig. 1'; Fig. -6 a lview o'thechan'gespeedg gear 4Vportion, showing' certain of the gears which were omitted in Fig. 1 tor the sake'oi 'clearness; Fig. 7' adiagrammatie view showing the circuit controlled bythe' primary govern or switch device; Fig. 8 a plan' view of the switch contact mechanism; Fig. 9 aplan view of the gear locking vdevice and Fig. 1 0 a face view or said gearlocking device.`

The primary speed'governor device may comprise a housing 1 adapted tol 'be mounted on the end of an axle of' the locomotive, such Vas the pony truck axle 2.y Theend of the axle yis'made-oi reduced diameter, slightly tapered, and a `bushing 3 is' applied,'the bush- I Y-the receptacle 113;v governor' mechanism-'embodying my mven- Y .ing being held in place by a collar -4 and bei ing also lreyed to the axle 'by a spline 5. The collar 4 1s held-in place by a nut 6 having threadedfengagement on the end ot the axle.

A ring- 7 at the inner en d of the bearing-'also rotates'wi-th tl1e"aXle, -.the inner end of the bushing 3 beingdisposed 'in an annular groove cut i111 the Ting,A Suitablebabbitt liners S are *interposed between the housing 1 and the bushing 3. f 1. -j

YSecured to the .bushing 3 by a spline 9 is a bevel. gear 10, meshing with a bevel pinion 11, and the pinion 11 is secured to the lower end of ia driven shaft y12..I 'At its npperend, the y.shaft '12 'carries a speed governor vreceptacle 13 and withinthe receptacle are mounted gov- Iernor balls 14;. The operation of the governor balls as.thespeerl.y of .rotation is increased is adaptedfto'drnpart;vertical 'movement to 'shaittf15.-1The upperfendfof the shaft 15 is :provided-with .a yreceptacle. 2() for receiving the lower :portioncof' a non-rotating member .1'6, them'emberbeing prevented from rotating `by 'apin 17 carried-bythe switch. housing 18. 'Arollerbearingyw is'interposed between zthewals. ofthe; receptacle 20' and the member 16 and a rloller bearing 21 isiprovided between vthe walls of ,a ca s'ingsection1 22 and the reduced bearing end .off

11n order itohold thegovernor device unit l against rotation about the axle 2, a plate member 24 is secured by 'bolts' 25 lto a wall of the f housing 1, and at theu'pper end the member 2i is Vprovided with a' socket for receiving the ballfshap'ed end 26 of a rod 27, the end 26 31. Thevpla'te 31is secured to a' portion 32 of the'jflocomotive. l.; The'rod 27 lholds the governor .device unitagalnst rotation about the the cover plate 23 ot` axle 2,'butthe balland-socket connections of the r'odf permit vertical-and. llateral movementof-the housing with the axle without straining thevgovernor device. v

Disposed Within the switch housing 18 is a switch mechanism comprising a contact receptacle '33 containing pairs `of switch contacts '34 and '35. f A

A toggle switch `is providedhaving connected contacts 36 carried by toggle linlrsg and shoulder 4'5 then coil springs 38 under tension tending to pull the contacts together. A similar toggle switch is provided for the contacts having connected contacts 39 carried by toggle links i 40 and a coil spring 41.

The toggle links are pivotally 4connected to a movable member 42 having a downwardly extending rod 43 Whichextendsinto a bore of the member 16. The rod 43 also extends upwardly and carries a' spring cage comprising a cylindrical section 44 having at its lower end an inturn'ed annular shoulder 45. A cylindrical section'46 hastelescopie engagement Within the section 44, and the upper portion of the section 46`islongitudinally slotted to form' spring clips having outwardly extending lukes 47. 4A` c'oil spring 48 is disposed' withinthe sectionsA 'and the sections are assembled by springing the section 46 into the section 44, the outer ends oi the linkes 47 being beveled for this purpose. The engagement'ot the' lukes'47 with the prevents separation l ot the sections. l Y 1 'fj 1 The upper end ofthe rod 43 engages in a bore provided in a capmember- 49 Whichis secured to the switch housing 18.

The housingl of thej primary governor device is provided with opposite' openings through 'which auxiliaryv governor devices may be operatively connected'to` theprimary governor device. In-the` drawings, 'one 'such auxiliary governorv device'is shown applied to the primary governordevice, and' since .the construction is substantiallythe same vas that of the primary governor device, .no1furt-her description is deemed necessary, eXc'ptas to ernor device is operativelyl connected toy the prima-ry governor device; u l Y Secured to the driver shaft 12-othe auxiliary governor device is al gear E50 and meshing with said gear is a gear'l earriedby .a

stub shaft 52. Also meshing, with thev gear 50 is a gear 53 secured to a stubshaft'54 'and also secured to the stub shaft 54 isi-agear 555 maybe. adjusted to two' positions,2one in which the gear 56 fmeshes'with 'the1g'earf51, as shown' in Figs. .3 'and5,andtheother in which the gear 56 mesheswith' the gear 55, as shown in Figs. 4 and 6. 'd

In order to lock thegear 56 ineither of its,

two positions, the shaft-12 is provided -Witha bore, containing a coil spring 57'Which acts on balls 58 at itsopposite ends. Theballs are adapted to engage in'correspondingpairs of recesses 59 and 60`in the gear 56.- vIn one position, the balls 58-engage in' the .recesses760, as

shown in Fig, 5, With ther-'gear-f meshing with the gear 51, and vin the'other positionfthe balls 58 engage in the recesses 59;.tvith the gear 56 meshing with the 4gear 55', as shown inFig.6." z. "f

Inorder to urtherensure that the gears willV beproperly positionedfthe' hub F61 of the gear 56 is provided with an annular groove 62. Adaptedto engage said groove is a yoke63 carriedjby an arm 64 and said arm is secured to a coverplate 65. The cover plate 65 is so secured to the housing 1 that the yoke 63 Will` -hold the gear 56 in the position shown in Fig. 2, but When the plate 65 is removedl and applied to the housing so that the lower edge of the plate is uppermost, the yoke V63 Will engage the groove 62 only if the gear 56 is inthe position inwhich said gearmeshes'with the gearv 55. Inorder to prevent the possible shifting of `the gear 56 CII rom the position shown in Fig. 2te itsupper s,

'positiomthe' arm carrying the yoke 63 is pro- 'vrded Withan upwardly and inwardly pro- .jeetmg` member 66 Which issoapositioned that it 'prevents the application-ot' theplate 65,

ting-Whichever designation reads uppermost.

Lubrication is provided for by employing the `chamberwthin the housing 1, below the axle 2, as an oil sump. A gearpump having igears I:G7-and 68is providedl and said. pump is disposed in? the base of thehousing l. The ff gear issecured to a vertical shaft-.69 which is providedat lits/upperv end with: abevel pinion adapt'ed tomesh 'with the' gear 10.

Theoil pumpedbythe pump from the..oil chamber passes through inlet openings\.7l

v lto `the pump andA thence .out through disthe gear means by 'which theau'Xiliary. govchargepassag'es 7 2 controlled bycheck valves 7 3 to a passage 74 Which leads to` a pipe v75. f @The '1 pipe -7 5 supplies oil tov a passage 76,

points by branch lpassages (notshown).

The passage,7 6also` leads to a chamber 77, communication toavhich is controlled by 4a check valve" 78 subjectio i the pressure of a l :spring 79. Anoverflowpipe 80 connects with Slidably mounted onandf keyed to rotate with the shaft` 12' is a gear 56 and said gear f checkg vVabre-,78,y willjlit .and relieve .the pressure,.permitting-the oillto [How back to the .oil sump .througlnt-he.dischargepipe 80. v

primary ,gQYernor device,.con trols a circuit -lncludingga sourc'eiof currentsuch as a generator 81, and a magnet/82,., .Thegmagnet 82 controls the operation i of a "valve l8 3. AVlhen As shown in Fig, 7,'theswitch device of the the'magnet 82 ,-isZ energized, the valvve83 is vheld seated,-as shown in 7. Upon deenergization'of the magnetSQ, thefvalve'83 'isunseated l,bythe spring 84and passage 85 is then connectectto: an atmospheric exhaust from Whchthepil i's'distributed towvarous liceale@ 3 port 4The Vpassage 85 leads to,l an yapplivcation'valve'device. (notlshown), which. is normallyfheld inactive byffinidunder ,p1-esj# sure, but isjadapted when fluid 4is,vent'ed therefrom through' passage 85 toshift and cause- .the operation lof mechanism foieecting an application ofltliebrakes. e Whenthe,primarygovernor levi ernor dev-ice isapplied.- f A si1nilar cover plate isprovided forfolosing the other opening yinthe primarygoveinor housing l, in case the auxiliary governor deviceshown in Figlis not employed. V-

'tavillthus beseengthat one, two, -or three governor devicesmay be employed, as desired, sothat the kapparatus may be readily changedto suitt-hel speed limit requirements inlajny installation.- f

Havingnow described my invention, what Iclaim ,as newv and desi-re to secureby Letters Patent-int. f i

l.- In aspeed governor mechanism, the rcernbination with "ia, drivingnxle, a driven shaft ,.rgearedftoisaid axle,y and a' speed governor carried andoperated bysaid shaft, of .an auxiliary, driven shaft, a speed governor vcarried and operated by said shaft,and gears :oroplativelyfconnecting said lshaft for opthrougln;tliecontact$ 36 i-aIl-.fli and-.censeliltlgftlle Aauxiliary fshaft from the axle quentlyth'e-springS-,SS-andlll willthenieause Vdriven shaft.; a flipping ofi the contacts ,36 fand39 away from engagement with thel contacts .34 andv to a gposi-tion 'ing `which, thecontactsn and 39 ,engage Stops'' 'fandi88- i; Thefcircuit. of .the magnet-82m thus openedand thefvalve .is permitted to 1 unseat rthe act-'ien of sp 'ing 845,4 g and an --application ofzthe brakes is; e=f- .fected by theventingof fluid under pressure from ,the application; ivalvedevice-,- i (not shown). i l/Vhenan auxiliary governor device is. employed, AasshowninVFig. zlf,-thefltrain may be controlledy in accordance With'ftyvo .speed llimits, for example, ithe primaa'y' governor device may operatefa-t, a lowespeed limit :and ,the auxiliary,y governor @device ati as higher speed limit. In this case, meansvazre; provided,lby.fivhich Wlinthe train is to operate at the low speed limit, the control by the auxiliary governor device is rendered ineffective and the apparatus operates with only the primary governor device effective, and operating as hereinbefore described.

If, however, the train is to operate at the higher speed limit, the auxiliary governor device is rendered effective to control the speed of the train, while the primary governor device is rendered ineffective. As the apparatus and circuit arrangements for accomplishing this action form no partof my invention, the same has not been shown in the drawings.

If it is desired to control the train at three different speed limits, an additional auxiliary governor devi-ce may be applied to the primary-governor device at the side opposite that to which the auxiliary governor device is shown applied in Fig. l.

`When such additional auxiliary governor device is not used, a cover plate 89 is employed to close the opening in the housing l, as shown in Fig. 1. Said plate is, of course, removed when the additional govce is idle or isrunninlg -at .a'speed below ,apredeter mined limit, vthe contacts y36y and 39 are held in engagement with the` contacts 34 and ,'35, as lshown in Figi?, so that the -circuitis closed through the lnagnetfSQ andthe magnet is thus maintained energized byfcur-rent from the generatorl.-v If lthe speed ofthe train :exceeds a predetermined limit, the operation of the governorballs 14e will cause af Sufficient vertical movement of the member, 42, so thatthe lpivot ,connection-s; of the toggle ,links 37 i and ftd-,will be shifted past the :centen line 2., In' a vspeedgovernor..mechanism,the @Ombnation witha driving axle, a driven shaftfgeared to said axle, and a speed gov* -e1;'no r;operated by=saidishaft, of an auxil- `ryffdr-iven shaft, a speed governor-'operated by saidf shaft, v.aff-shiftablegear. carried by 'ille-51H12 dlivfenfsliaft, a igea-r lcarried vby vthe Second;.fdriver'l.,isliaft, and :gears 'operatively connecting the gears on the driven sha-ft in :differentposition-sy of saidV sliiftable; gear.

rai 341331,., rspeedu governor mechanism,- the cgllbination with a primarygovernor .device cmprising a hemin'gaf driving'axle,'ladriven vsha'i:te;operativelyv .gearedfto fsaidaxle, and a vispeedrgc.vernoii operatedzfbysaid shaft, of an la'llxiliary governor device `comprising a housfing adapted to be secured to the- :primary by said driven shaft, and gears operatively connecting the auxiliary driven shaft to the primary driven shaft.

4. In a speed governor mechanism, the combination with a primary governor' device comprising a driving axle, a` driven shaft operatively geared to said axle, and a speed governor operated by said shaft, of an auxiliary governor device comprising a driven shaft, a speed governor operated by said shaft, a gear shiftable to two positions on the primary driven shaft, gear means for connecting the primary gear to the auxiliary gear in one position of the primary gear, and gear means for connecting the primary gear to the auxiliary gear in the other position of the primary gear.

5. In a speed governor mechanism, the combination with a primary governor device comprising a driving axle, a driven shaft operatively geared to said axle, a speed governor operated by said shaft, of an auxiliary speed governor device, gear means for driving said auxiliary governor device from the shaftof the primary governor device, in-

liens-ing, a" driven shaitrzafgovernr operated '1 cluding a gear on the primary driven shaft shiftable to two positions, and means for defining the two positions of said gear on the driven shaft.

6, ln a speed governor mechanism, the combination with a primary governor device comprising a driving axle, a driven shaft operatively geared to said axle, a speed governor operated by said shaft, of an auxiliary speed governor device, gear means for drivin@ said auxiliary governor device from the shaft of the primary governor device, including a gear on the primary driven shaft shiftable to two positions, means for deiining the two positions of said gear on the driven shaft, and means for locking said gear in either of its two positions.

7. In a speed governor mechanism, the conibinationlwith a primary governor device comprising a driving axle, a driven shaft operatively geared to said axle, a speed governor operated by said shaft, of an auxiliary speedI governor device, gear means for driving said auxiliary governor device from the shaft of the primary governor device, includiiig a gear on theprimary driven shaft shiftable to' two positions, yielding means for defining the two different positions 0f said gear on the driven shaft', and means for locking said gear in either of its two positions. w

8. In a speed governor mechanism, the combination with a primary governor device comprising a driving axle, a driven shaft operatively geared to said axle, a speed governor operated by said shaft, of anv auxiliary governor device, gear means for driving said auxiliary governor device from the shaft of the primary governor device, including a gear on the primary driven shaft shift-able to two positions, and means for locking said gear in either of its two positions comprising a member adapted to be secured to the primary governor device in either of two positions and provided with an extension for engaging with a part carried by said gear to prevent movement of the gear on the shaft.

9. In a speed governor mechanism, the combination with a driving axle and a pri mary governor device comprising a housing, a driven shaft in said housing geared to said axle, and a speed governor operated by said shaft, ofan auxiliary governor device com-- prising a housing, a driven shaft in said housing, a speed governor operated by said shaft, and gear means for operatively connectin g the driven shaft of the auxiliary governor device to the driven shaft of the primary governor device, the housing of the auxiliary governor device having an opening vadapted to register with an opening in the ing for permitting relative movement of the housing with the axle with respect to the vehicle', other than rotative movement.

ln testimony whereof I have'hereunto set my hand.

CLYDE G.` FARMER. 

